JP2016157633A - Power supply system and illumination system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply system that directly supplies a luminaire with an AC voltage suitable to operate the luminaire, and an illumination system using the same.SOLUTION: In a power supply system 8, a first AC voltage Vfrom a commercial power source is supplied to the primary side of a main breaker 12. A transformer 14 is provided at the secondary side of the main breaker 12, and transforms the first AC voltage Vto a second AC voltage Vlower than the first AC voltage V. The second AC voltage Voutput from the transformer 14 is supplied to the primary side of a sub breaker 16. An illumination power supply line 22 is provided to the secondary side of the sub breaker 16, and supplies the second AC voltage Vto a luminaire 20. The second AC voltage Vmay be a voltage (for example, 36 V or less) lower than a voltage at which a wiring work is required to have a special qualification. The illumination power supply line 22 may be provided with connection tools 24a, 24b for connecting luminaires 20a, 20b.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power supply system for supplying power to a lighting device and a lighting system including the power supply system.

  In recent years, lighting devices using LEDs (Light Emitting Diodes) as light emitting elements have attracted attention. LEDs are becoming more and more popular as lighting equipment with a low environmental load because they consume less power and have a longer life than conventional incandescent and fluorescent lamps. The LED is generally driven by using a DC power source, and a power circuit for converting AC input into DC is incorporated in most LED lighting devices (see, for example, Patent Document 1).

  In addition, an LED illumination system has been proposed that uses a DC power supply line instead of AC as a power supply line for LED illumination. In this LED lighting system, AC power supplied from a commercial power supply is collectively converted to DC power, and the converted DC power is supplied to each LED lighting fixture (for example, see Patent Document 2).

  On the other hand, a method for driving an LED by a pulsating voltage obtained by full-wave rectification of an AC input has been proposed. For example, an LED drive circuit in which a plurality of transistors selectively drive an LED unit according to an AC input voltage by connecting one end on the output side of the plurality of transistors to a connection point having a different number of LED stages in the LED unit. Is known (see, for example, Patent Document 3).

JP 2009-134945 A JP2013-247097A JP 2014-135252 A

  Since the LED element is very small compared to conventional incandescent lamps and fluorescent lamps, it has the potential to realize a lighter, thinner and smaller lighting device. However, since the drive voltage for turning on the LED is generally different from the commercial power supply voltage, it is necessary to incorporate a voltage conversion function into the LED lighting, which is one of the factors that hinder the lightening, thinning, and miniaturization of the LED lighting. Yes. If a direct current voltage suitable for LED lighting is directly supplied to the lighting device, the voltage conversion function may be omitted from the LED lighting. However, if a large-capacity switching power supply or the like is used to supply a DC voltage, unnecessary radiation noise generated in the power supply may spread widely through the power supply line.

  The present invention has been made in view of these problems, and an object of the present invention is to provide a power supply system that directly supplies an AC voltage suitable for driving the illumination device to the illumination device, and an illumination system using the power supply system. .

  In order to solve the above problems, a power supply system according to an aspect of the present invention includes a main breaker to which a first AC voltage from a commercial power supply is supplied to a primary side, a secondary side of the main breaker, A transformer for converting an AC voltage into a second AC voltage, a sub-breaker to which a second AC voltage output from the transformer is supplied to the primary side, and a secondary side of the sub-breaker are provided. And an illumination power supply line for supplying an alternating voltage.

  According to this aspect, the AC voltage suitable for driving the lighting device can be supplied by the transformer that generates the second AC voltage different from the voltage of the commercial power supply. In addition, by installing a sub-breaker in front of the lighting power line, even if the lighting power line is being constructed to change the layout of the lighting device, etc., the wiring work can be done safely on the secondary side of the sub-breaker. Can do.

  A power supply system according to another aspect of the present invention includes a main breaker to which a first AC voltage from a commercial power source is supplied to a primary side, a sub breaker connected to a secondary side of the main breaker, and a secondary of the sub breaker And a transformer for converting the first AC voltage to a second AC voltage lower than the first AC voltage, and a secondary side of the transformer for supplying the second AC voltage to the lighting device. Power supply line for lighting.

  Also in this aspect, the AC voltage suitable for driving the lighting device can be supplied by the transformer that generates the second AC voltage different from the voltage of the commercial power supply.

  The second AC voltage may be lower than a voltage that requires a specific qualification for wiring work.

  The power supply system is provided by being branched from the secondary side of the main breaker, and is provided with a branch breaker for supplying a first AC voltage to the primary side, and a secondary side of the branch breaker. And a general power supply line for supplying the power.

  The illumination power supply line may be provided with a connection tool for connecting the illumination device to the illumination power supply line. The connecting device may have a shape different from the shape of the outlet for connecting the electric device to the general power line.

  The main breaker, the transformer, the sub breaker, and the branch breaker may be provided in one distribution board.

  The lighting device includes a light emitting unit having a plurality of light emitting elements connected in series; rectifies a second AC voltage, and generates a pulsating voltage between a first output and a second output to which one end of the light emitting unit is connected. A constant current is sequentially supplied to each of connection points of different light emitting element stages of the light emitting unit, and a plurality of light emitting elements are stepped in accordance with the pulsating current voltage. A driving circuit having a constant current circuit for driving.

  The power supply system may further include an illumination control line that is provided along the illumination power supply line and through which a signal for controlling the operation of the illumination apparatus flows.

  Yet another aspect of the present invention is a lighting system. The illumination system includes the above-described power supply system, a light emitting unit having a plurality of light emitting elements connected in series, a drive circuit connected to the illumination power supply line and driving the light emitting unit with the second AC voltage as an input, May be provided. The drive circuit rectifies the second AC voltage and generates a pulsating voltage between the first output and the second output to which one end of the light emitting unit is connected, and is connected between the light emitting unit and the second output. And a constant current circuit that sequentially supplies a constant current to each of connection points of different light emitting element stages of the light emitting unit and drives a plurality of light emitting elements stepwise according to the pulsating voltage.

  The illumination system may further include an illumination control device that controls the operation of the drive circuit. The main breaker, the transformer, the sub-breaker, the drive circuit, and the lighting control device may be provided in one distribution board.

  ADVANTAGE OF THE INVENTION According to this invention, the alternating voltage suitable for the drive of an illuminating device can be supplied directly to an illuminating device.

It is a figure which shows typically the structure of the illumination system which concerns on embodiment. It is a circuit diagram which shows the structure of the illuminating device which concerns on embodiment. It is a figure which shows typically the structure of the illumination system which concerns on a modification. It is a figure which shows typically the structure of the illumination system which concerns on another modification. It is a figure which shows typically the structure of the illumination system which concerns on another modification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.

  FIG. 1 is a diagram schematically illustrating a configuration of an illumination system 6 according to an embodiment. The illumination system 6 includes illumination devices 20 a and 20 b (hereinafter also collectively referred to as the illumination device 20) and a power supply system 8 for supplying power to the illumination device 20. The power supply system 8 transforms AC power from the commercial power system 2 with the transformer 14 and supplies an AC voltage (for example, 30V) different from the AC voltage (for example, 100V or 200V) of the commercial power supply to the lighting power line. 22 is supplied.

  The power supply system 8 includes a main breaker 12, a transformer 14, a sub-breaker 16, and a lighting power supply line 22. In FIG. 1, assuming that the commercial power system 2 is the upstream side and the illumination power line 22 is the downstream side, the commercial power system 2, the power receiving device 4, the main breaker 12, the transformer 14, the subbreaker 16, and the illumination power line 22 are obtained. Arranged sequentially from upstream to downstream. In the following description, the upstream side is also referred to as “primary side” and the downstream side is also referred to as “secondary side”.

The primary side of the main breaker 12 is connected to the power receiving device 4 of the building 1, and the first AC voltage V ₁ from the commercial power supply is supplied via the commercial power system 2 and the power receiving device 4. The transformer 14 has a primary side connected to the secondary side of the main breaker 12, and converts the first AC voltage V ₁ from the commercial power source into a second AC voltage V ₂ suitable for driving the lighting device 20.

Second AC voltage V ₂ is preferably a voltage lower than the voltage required public qualifications such as electrical worker when the wiring work on the secondary side of the transformer 14. For example, in Japan, it corresponds to a voltage of 36V or less. The second alternating voltage V ₂ is set to be lower than or equal such a voltage, it is possible to improve the safety when the wiring work on the secondary side.

Transformer 14 may, if the Japanese market, a single-phase 100 V, constituted the first alternating voltage _{V 1} of the single-phase 200V or three-phase 200V to convert the second AC voltage _{V 2} of the single-phase 36V or less . Specific second AC voltage _{V 2,} for example, a single-phase 30 V, such as a single-phase 24V is selected. If you are outside Japan, the first AC supplied as commercial power in each country such as single phase 110V / 115V / 120V, single phase 220V / 230V / 240V, three phase 220V / 230V / 240V / 380V / 400V transformer 14 is configured to convert the voltages V ₁ to a desired second AC voltage V _2. The specific configuration of the transformer 14 is not particularly limited, and a transformer having an appropriate configuration and capacity may be used as the transformer 14 in accordance with the voltage and electric energy required for the illumination power line 22 on the downstream side.

  The primary side of the transformer 14 may be provided with a protection circuit for protecting the lighting device 20 connected downstream from surges, inrush currents, and the like. This protection circuit may be configured by a known protection circuit including a zinc oxide (ZnO) varistor element, a bidirectional Zener diode, a thermistor element, a snubber circuit including a resistor and a capacitor, and the like.

The primary side of the sub breaker 16 is connected to the secondary side of the transformer 14, and the illumination power supply line 22 is provided on the secondary side of the sub breaker 16. Therefore, the illumination power supply line 22 is supplied with the second AC voltage V ₂ different from the first AC voltage V ₁ from the commercial power supply.

The illumination power line 22 is a power line for supplying the second AC voltage V ₂ to the illumination device 20 provided in the building 1, and is wired, for example, inside the ceiling or wall of the building 1. The illumination power supply line 22 may be provided with dedicated connection devices 24 a and 24 b (hereinafter collectively referred to as connection device 24) for connecting the lighting device 20. The connection device 24 is a device such as a socket or a plug, and preferably has a shape different from outlets 74a and 74b of a general power line 72 described later. That is, it is desirable that the connecting device 24 has a shape that prevents a plug of a general electric device 70 from being connected. This is because it is possible to prevent the electrical devices 70 having different operating voltages from being erroneously connected, and to prevent failure of the devices due to erroneous connection. The lighting device 20 may be connected to the illumination power line 22 by directly connecting the wiring to the illumination power line 22 by caulking or the like.

The power supply system 8 may further include a branch breaker 18 and a general power supply line 72. The branch breaker 18 is branched and connected from the secondary side of the main breaker 12. A general power line 72 is provided on the secondary side of the branch breaker 18. Therefore, the first AC voltage V ₁ from the commercial power supply is supplied to the general power supply line 72.

The general power line 72 is a power line for supplying the first AC voltage V ₁ to a general electric device 70 provided in the building 1, and is wired, for example, inside the ceiling or wall of the building 1. The general power line 72 is provided with outlets 74a and 74b for connecting the electric device 70, and the electric device 70 corresponding to the outlet shape is connected thereto.

  As illustrated, the main breaker 12, the transformer 14, and the sub-breaker 16 may be provided inside one distribution board 10. When the power supply system 8 includes the branch breaker 18 and the general power supply line 72, the branch breaker 18 may be provided inside the distribution board 10. By disposing these devices constituting the power supply system 8 on one distribution board 10, the maintainability of the power supply system 8 can be improved.

Next, the illumination device 20 connected to the illumination power line 22 will be described.
FIG. 2 is a circuit diagram illustrating a configuration of the illumination device 20 according to the embodiment. The lighting device 20 includes a light emitting unit 30 and a drive circuit 40. Drive circuit 40 drives the light-emitting unit 30 as an input of the second alternating voltage V ₂ supplied from the illumination power supply line 22.

  The light emitting unit 30 includes N subunits 32_1, 32_2,..., 32_N (hereinafter collectively referred to as subunits 32) connected in series. Each of the plurality of subunits 32 includes one or more light emitting elements. Therefore, the light emitting unit 30 has a plurality of light emitting elements connected in series. The light emitting element included in the light emitting unit 30 is an LED, for example, a white LED suitable for illumination use.

  The subunit 32 may include two or more light emitting elements connected in series. Each of the plurality of subunits 32 may include the same number of light emitting elements connected in series, or may include a different number of light emitting elements. For example, the first subunit 32_1 includes two light emitting elements connected in series, and the second subunit 32_2 to the Nth subunit 32_N include three light emitting elements connected in series.

In the light emitting unit 30, the number of light emitting elements connected in series is set so that all the light emitting elements of the N subunits 32_1 to 32_N can be turned on in the vicinity of the peak value of the pulsating voltage _VOUT . For example, since the second AC voltage _{V 2} is if 30 V, the peak value of the pulsating voltage _{V OUT} is approximately 42V, the forward voltage drop _{V F} of the white LED is about 3.2V before and after the apex The number of light emitting elements that can be lit around the peak value is about 10 to 14. Therefore, in order to enable driving with the second AC voltage V ₂ = 30 V, for example, the light emitting unit 30 in which a total of 12 LEDs are connected in series may be used. Such a light emitting unit 30 may include first to fourth subunits 32_1 to 32_4 each having three LEDs connected in series.

The subunit 32 may include two or more light emitting elements connected in parallel, or is configured by connecting a plurality of light emitting element arrays composed of two or more light emitting elements connected in series in parallel. May be. The plurality of subunits 32 may include the same number of light emitting element arrays connected in parallel, or may include different numbers of light emitting element arrays. By increasing the number of light emitting element rows included in the subunit 32, without changing the second alternating voltage V ₂ can be driven, it is possible to increase the amount of the entire light-emitting unit 30. In addition, you may adjust the light quantity as the whole light emission unit 30 by changing the output of the LED element used for the light emission unit 30. FIG.

  The light emitting unit 30 has a common input 34 and N connection points 36_1, 36_2,..., 36_N (hereinafter collectively referred to as connection points 36) corresponding to the N subunits 32. The common input 34 is connected to the first output 46 of the rectifier 45, and the N connection points 36 are connected to the N transistors 42_1, 42_2,... 42_N of the constant current circuit 41, respectively.

The drive circuit 40 includes a constant current circuit 41 and a rectifier 45. The rectifier 45 rectifies the second AC voltage V ₂ supplied from the illumination power supply line 22, and generates a pulsating voltage _VOUT between the first output 46 and the second output 47. As shown in the figure, the rectifier 45 is configured by a diode bridge.

The constant current circuit 41 is connected between the light emitting unit 30 and the second output 47 of the rectifier 45. The constant current circuit 41 is configured to supply a constant current to each of the N connection points 36 of the light emitting unit 30 in order. The constant current circuit 41 drives the plurality of subunits 32 stepwise by sequentially switching the connection point 36 that supplies a constant current in accordance with the pulsating voltage _VOUT from the rectifier 45.

For example, when the pulsating voltage _VOUT is a voltage value that can drive only the first subunit 32_1, the constant current circuit 41 supplies a constant current to the first connection point 36_1. Thereafter, when the pulsating voltage _VOUT rises to a voltage value capable of driving both the first subunit 32_1 and the second subunit 32_2, the constant current circuit 41 supplies a constant current to the second connection point 36_2. Further, when the pulsating voltage _VOUT approaches the peak value and becomes a voltage value that can drive all of the N subunits 32_1 to 32_N, the constant current circuit 41 supplies a constant current to the Nth connection point 36_N. Supply. On the other hand, when the pulsating voltage _VOUT decreases from the peak value, the constant current circuit 41 switches the connection point 36 that supplies the constant current according to the decreasing voltage value.

At this time, the current I _LED supplied to the light emitting unit 30 is set stepwise according to the number of the subunits 32 to be driven. More specifically, the drive current I _LED is set to increase stepwise as the number of the subunits 32 to be driven increases or as the number of the light emitting elements to be driven increases.

  The constant current circuit 41 includes N transistors 42_1, 42_2,... 42_N (hereinafter also collectively referred to as transistors 42) corresponding to the N connection points 36 of the light emitting unit 30, and the N transistors 42. And a drive control unit 43 that controls the operation.

  Transistor 42 is a field effect transistor (FET), as shown. The drain terminals of the N transistors 42 are respectively connected to connection points 36 of different light emitting element stages of the light emitting unit 30. The source terminal of the transistor 42 is connected to the drive control unit 43. A control signal from the drive control unit 43 is input to the gate terminal of the transistor 42. As the transistor 42, a bipolar transistor may be used instead of the FET.

Drive control unit 43, the current _{I 1,} I 2 flowing through the transistor 42, ..., and detects the _{I N,} and outputs a control signal to the gate terminal of each transistor 42 so that a desired constant current flows through the transistor 42 . The drive control unit 43 is connected to each source terminal of the transistor 42, and at least part of the currents I ₁ , I ₂ ,..., I _N flowing through the transistor 42 is output to the second through the drive control unit 43. 47 to flow. The drive control unit 43 may use a known technique, and its configuration is not limited. The drive control unit 43 may be a control circuit composed of circuit elements such as resistors, transistors, and operational amplifiers, and may include a microcomputer that generates a control signal by processing based on a predetermined program.

The drive circuit 40 may include a capacitor 48 that smoothes the pulsating voltage _VOUT from the rectifier 45 so that the voltage supplied to the light emitting unit 30 does not fall below a predetermined threshold voltage. By providing the capacitor 48, it is possible to prevent a flicker phenomenon from occurring due to a period in which the light emitting unit 30 is not lit.

  According to the present embodiment, an AC voltage suitable for driving the lighting device can be directly supplied to the lighting device 20. Therefore, it is not necessary to provide a transformer or a DC power source for each lighting device 20, and the LED lighting can be reduced in weight, thickness, and size. Since the direct current power source incorporated in general LED lighting has a short life compared with the LED element, the long life of the lighting device 20 is realized by not providing the direct current power source in each lighting device 20. be able to. In addition, since a DC power source such as a switching power source is not required to drive the lighting device 20, generation of unnecessary radiation noise can be suppressed.

  Moreover, according to this Embodiment, since the illumination power supply line 22 is provided via the transformer 14, the illumination power supply line 22 can be insulated from the commercial power system 2. Thereby, the electrical safety of the power supply line 22 for illumination can be improved. Further, by setting the voltage flowing through the lighting power line 22 to 36 V or less, the wiring work of the lighting power line 22 can be performed regardless of the qualification of an electrician. Thereby, the cost required for the wiring work of the illumination power supply line 22 can be reduced.

  For example, in store spaces in large commercial facilities such as department stores and shopping malls and exhibition booths in large exhibition halls, the contents of sales and exhibitions are changed in a relatively short period of time, so there is a need to change the lighting equipment accordingly. is there. When wiring work for lighting is performed in order to change the lighting equipment, usually 100V wiring work same as that of a commercial power supply is required, and therefore work by an electrician is required, and wiring equipment for 100V is required. . On the other hand, according to the present embodiment, it is possible to use a wiring device having a relatively low withstand voltage for the construction of the illumination power supply line 22, and the work by qualified personnel is unnecessary. In addition, since a lighter, thinner, and smaller illuminating device 20 can be employed as compared with illumination for 100 V, facilities for fixing and supporting the illuminating device 20 can be simplified. Thereby, the cost required for the wiring work etc. accompanying the change of lighting equipment can be reduced.

(Modification 1)
FIG. 3 is a diagram schematically showing a configuration of the illumination system 6 according to the modification. The illumination system 6 according to the present modification is different from the above-described embodiment in that the power supply system 8 further includes an illumination control line 26 and an illumination control device 28. Hereinafter, the difference from the above-described embodiment will be mainly described.

  The illumination control device 28 is a device for collectively controlling the operations of the illumination devices 20 connected to the illumination power supply line 22. The illumination control device 28 is connected to each illumination device 20 via the illumination control line 26, generates a signal for controlling on / off of each illumination device 20, lighting luminance, lighting color, and the like, and the illumination control line 26. It transmits to each illuminating device 20 via. The illumination control device 28 is provided, for example, inside the distribution board 10. The illumination control device 28 may be configured by a switch or the like for switching each illumination device 20 on and off, an operation display device such as a touch panel type liquid crystal display, a microcomputer that generates a control signal in accordance with an input operation, and the like. And a control circuit including

  The illumination control line 26 transmits a control signal from the illumination control device 28 to each illumination device 20. The illumination control line 26 may be configured by a communication line common to each illumination device 20 such as a LAN, or may be configured by a plurality of communication lines individually provided for each illumination device 20. The illumination control line 26 is disposed along the illumination power supply line 22 and connected to the connection tool 24. Thus, both the power line and the control line can be connected to each lighting device 20 simply by connecting each lighting device 20 to the corresponding connecting device 24.

  According to this modification, the operation of each illumination device 20 connected to the illumination power supply line 22 and the illumination control line 26 can be managed in an integrated manner. Further, by causing the illumination power supply line 22 and the illumination control line 26 to run side by side, both the power and the control signal can be supplied to each illumination device 20 by the common connecting device 24. Thereby, compared with the case where it is necessary to connect a power line and a control line separately, the installation operation | work of each illuminating device 20 can be made easy. Further, by providing the lighting control device 28 in the distribution board 10, it is possible to manage the main devices of the power supply system 8 at one place, and to reduce the labor required for maintenance of the power supply system 8. .

(Modification 2)
FIG. 4 is a diagram schematically illustrating a configuration of an illumination system 6 according to another modification. In this modification, the light emitting unit 30 and the drive circuit 40 included in the lighting device 20 are separated, and drive circuits 40 a to 40 c for driving the light emitting units 30 a to 30 c are provided inside the distribution board 10. This is different from the above-described embodiment. Hereinafter, the difference from the above-described embodiment will be mainly described.

  The illumination system 6 includes a main breaker 12, a transformer 14, a sub-breaker 16, an illumination power line 22, an illumination control line 26, an illumination control device 28, drive circuits 40a to 40c, and a light emitting unit 30a. ~ 30c. As shown in the figure, each of the drive circuits 40 a to 40 c is connected to the illumination power supply line 22 and the illumination control line 26, and is provided inside one distribution board 10 together with the main breaker 12 and the illumination control device 28.

  The light emitting units 30a to 30c and the corresponding drive circuits 40a to 40c are connected by drive lines 35a to 35c configured by a plurality of connection lines. Each drive line 35a-35c respond | corresponds to the connection line which connects the drive circuit 40 shown by FIG. 2, the common input 34 of light-emitting unit 30, and each connection point 36_1-36_N.

  According to this modification, the drive circuit 40 can be separated from the main body of the lighting device, and only the light emitting unit 30 can be used as the main body of the lighting device. Thereby, the main-body part of an illuminating device can be made lighter, thin, and small. Further, by arranging the drive circuits 40a to 40c inside one distribution board 10, these can be maintained collectively.

(Modification 3)
FIG. 5 is a diagram schematically showing a configuration of an illumination system 6 according to yet another modification. This modification differs from the above-described embodiment in that the order of connection between the transformer 14 and the sub-breaker 16 is reversed from that in FIG. As shown in the figure, in this modification, a sub-breaker 16 is connected to the secondary side of the main breaker 12, a transformer 14 is provided on the secondary side of the sub-breaker 16, and an illumination is provided on the secondary side of the transformer 14. A power line 22 is provided. The main breaker 12, the sub-breaker 16, and the transformer 14 are provided inside one distribution board 10. Also in this modification, the same effect as the above-described embodiment can be obtained.

  In a further modification, the transformer 14 may be connected to the secondary side of the branch breaker 18. That is, the transformer 14 may be provided on the general power supply line 72 and the illumination power supply line 22 may be provided on the secondary side of the transformer 14. At this time, the transformer 14 may be provided inside the distribution board 10 or may be provided outside the distribution board 10. Further, another breaker may be provided on the secondary side of the transformer 14.

  The present invention has been described based on the embodiments. The embodiments are exemplifications, and it will be understood by those skilled in the art that various modifications can be made to combinations of the respective constituent elements and processing processes, and such modifications are within the scope of the present invention. .

  In the above-described embodiment and modification, the case where the illumination power supply line 22 and the general power supply line 72 are provided one by one has been shown. In a further modification, a plurality of illumination power supply lines 22 and general power supply lines 72 may be provided. When a plurality of illumination power supply lines 22 are provided, the secondary side of the transformer 14 may be branched to provide a plurality of subbreakers 16, and the illumination power supply lines 22 may be provided for the respective subbreakers 16. In addition, a plurality of lighting power supply lines 22 may be provided by branching the secondary side of the main breaker 12 and providing a plurality of transformers 14. In this case, the secondary side voltages of the plurality of transformers 14 may be the same or different depending on the illumination power supply line 22.

  In the above-described embodiment and modification, lighting of each lighting device or each light emitting unit is controlled by the wired lighting control line 26. In a further modification, lighting of each lighting device or each light emitting unit may be controlled by a technique such as wireless communication or infrared communication. For example, an infrared light receiving sensor may be connected to a drive circuit so that lighting of each lighting device or each light emitting unit can be controlled by operating an infrared remote controller.

  In the above-described embodiment and modification, the configuration in which the lighting device is connected to the lighting power supply line 22 that supplies the second AC voltage has been described. In a further modification, a power supply line for supplying the second AC voltage may be provided with a special power supply line for connecting an illuminating device or an electric device other than the illumination. That is, a special power supply line connected to the sub breaker 16 may be provided instead of the illumination power supply line 22. In this case, a power system including a power supply system including a special power supply line and an electric device connected to the special power supply line may be constructed.

  6 lighting system, 8 power supply system, 10 distribution board, 12 main breaker, 14 transformer, 16 sub-breaker, 18 branch breaker, 20, 20a, 20b lighting device, 22 lighting power line, 24, 24a, 24b connection Appliances, 26 lighting control lines, 28 lighting control devices, 70 electrical equipment, 72 general power lines, 74 outlets.

Claims (10)

A main breaker to which a first AC voltage from a commercial power source is supplied to the primary side;
A transformer provided on the secondary side of the main breaker for converting the first AC voltage into a second AC voltage lower than the first AC voltage;
A sub-breaker to which the second AC voltage output from the transformer is supplied to the primary side;
An illumination power supply line provided on the secondary side of the sub-breaker for supplying the second AC voltage to an illumination device;
A power supply system comprising: A main breaker to which a first AC voltage from a commercial power source is supplied to the primary side;
A sub-breaker connected to the secondary side of the main breaker;
A transformer provided on the secondary side of the sub-breaker for converting the first AC voltage into a second AC voltage lower than the first AC voltage;
An illumination power supply line provided on the secondary side of the transformer for supplying the second AC voltage to the illumination device;
A power supply system comprising:   The power supply system according to claim 1 or 2, wherein the second AC voltage is lower than a voltage that requires a specific qualification for wiring work. A branch breaker provided by branching from the secondary side of the main breaker, wherein the first AC voltage is supplied to the primary side;
A power line for general use, provided on the secondary side of the branch breaker, for supplying the first AC voltage to an electrical device;
The power supply system according to any one of claims 1 to 3, further comprising: The lighting power line is provided with a connection tool for connecting the lighting device to the lighting power line,
The power supply system according to claim 4, wherein the connection device has a shape different from a shape of an outlet for connecting the electric device to the general power supply line.   The power supply system according to claim 4 or 5, wherein the main breaker, the transformer, the sub-breaker, and the branch breaker are provided in one distribution board. The lighting device includes:
A light emitting unit having a plurality of light emitting elements connected in series;
A rectifier that rectifies the second AC voltage and generates a pulsating voltage between a first output and a second output to which one end of the light emitting unit is connected, and is connected between the light emitting unit and the second output A constant current circuit that sequentially supplies a constant current to each of connection points of different light emitting element stages of the light emitting unit, and drives the plurality of light emitting elements stepwise according to the pulsating voltage. When,
The power supply system according to any one of claims 1 to 6, further comprising:   The electric power according to claim 1, further comprising an illumination control line that is provided along the illumination power supply line and through which a signal for controlling the operation of the illumination device flows. Supply system. The power supply system according to any one of claims 1 to 6,
A light emitting unit having a plurality of light emitting elements connected in series;
A drive circuit connected to the illumination power line and driving the light emitting unit with the second AC voltage as an input;
The drive circuit is
A rectifier that rectifies the second AC voltage and generates a pulsating voltage between a first output and a second output to which one end of the light emitting unit is connected;
A constant current is sequentially supplied to each of connection points of different light emitting element stages of the light emitting unit connected between the light emitting unit and the second output, and the plurality of light emitting elements are stepped in accordance with the pulsating voltage. And a constant current circuit for driving the lighting system. A lighting control device for controlling the operation of the drive circuit;
The lighting system according to claim 9, wherein the main breaker, the transformer, the sub-breaker, the driving circuit, and the lighting control device are provided in one distribution board.

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